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Achievement of minimal residual disease (MRD) negativity in peripheral blood and bone marrow correlates with improved outcomes in patients with B-cell non-Hodgkin lymphoma. These investigators evaluated the prognostic value of MRD status in patients with advanced follicular lymphoma undergoing immunochemotherapy in the industry-sponsored, multicenter, phase 3 GALLIUM trial (NEJM JW Oncol Hematol Oct 12 2017 and N Engl J Med 2017; 377:1331).
Previously untreated patients were randomized to induction with rituximab or obinutuzumab plus chemotherapy, followed by maintenance with the assigned antibody for 2 years. MRD was assessed by nested and quantitative PCR for clonal immunoglobulin gene rearrangement and the t(14;18) breakpoint; positive MR…